The purpose of this video is to give folks an idea of how clean the exhaust is while running a rocket mass heater in Missoula, Montana.

When we first start it, there will be smoke. And there was smoke in the middle of the burn sometimes, but I think that most of that has to do with things that need more design improvements. For most of the
time, the exhaust was a lot like what is shown in the video - there is fire, but no smoke. Marci Anderson gets her nose right in there.

Another important thing to note is that the temperature of the exhaust: see how we have a hot, clean fire burning and guido does not burn his hand when he puts it in the exhaust. It feels warm, but not hot. We measured it at about 90 degrees when the barrel was at about 850 degrees.

I show the materials being moved by the freecycles folks from the freecycles HQ in Missoula to Caras Park (downtown Missoula). Then a bit of building it.

This rocket mass heater is a prototype for some variations. A wood box shows a different aesthetic, a much taller heat riser design, using dry, loose fill (rocks and sand). This should be a lighter design than other rocket mass heaters - so it might be good for places that have a wood floor.

This might also be the fastest time a rocket mass heater was ever built: an hour and fifteen minutes.